Internal-combustion engine



H. V. J. JOUFFHET.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED Aus.25, 1917.

1,336,298, Patented Apr. 6, 1920.

HENRI vieron JULnsJoUrrnr-ir, or Panis, FRANCE.

INTEBfNL-CGMBUSTGN ENCT'ITE.

Specification of Letters Patent.

Patented Apr. 6, 1920.

Application filed August 25, 1917. Serial No. 188,204f

A that is so that t1 ey require less fine machine work while at the sametime they are superior to and more easily taken to pieces than is thecase with engines'as present constructed.

in the ns i method of constructing engines of this crass, the head isprovided with a cylindrical enlargement and between the outer wall ofthe said enlargement and the inner wail. of the head is an annular spaceadapted to receive the upper end of the sleeve or sleeves.

rlie present invention consists essentially in providing, in place ofthe construction just mentioned, a piston connected by means of asuitable joint to the head, which piston has the same function as theaforesaid enlargement.

The invention refers moreover, in addition to the principal feature justmentioned to certain other constructional arrangements which will bemore fully described hereafter and it comprises certain structures tocarry the invention into eifect, and, as new industrial. productsengines of the class in question comprising the application of theimprovements, as well as special parts suitable for their construction.

In order that the invention may be clearly' manner, into an annularportion of the head and the following or some analogous construction isadopted.

o is the cylinder which is provided with an ordinary head 0.1. t1 and.b2 are the two slefwes mounted concentrically and having their movementscontrolled in the ordinary manner.

c is a piston, the outer diameter of which is equal to the innerdiameter of the small sleeve b2.

rhis piston c is connected by means of a controlling rod (Z ofappropriate length to the head al, the said connecting rod being jointedto thevpiston and to the head in any suitable manner, preferably bymeans of a universal joint.

lilith this construction the piston takes the place of and fulfils thesame functions as the inner cylindrical enlargement usually proviled;but, two important advantages accrue.

(ln the one hand the centering` of the piston is automatically effectedthus avoiding the complicated and delicate methods of centering andsmoothing the head, where the head. is separate from the cylinder andthe difficult machining of the annular chamber for the reception of theupper edge of the sleeve where the head is in one with the cylinder. Inaddition by regulating the length of the connecting rod, the compressionof the engine may be easily regulated.

in some instances in addition to providing the simple construction justdescribed, it is preferable to embody the whole or part of the followingimprovements. Packing rings c1 may be furnished adapted to increase thetightness between the piston c and the sleeve Z22.

The piston c may be provided with a closed top or cover 00, thusavoiding' the accumulation of lubricating oil within the cavity. Theconnecting rod Z is in that case jointed to the cover 0.

The shaft c and the eccentric f are preferably located in the head, orother like mechanism for controlling the sleeves may ,be similarlylocated, an arrangement rendered possible by the absence of thecylindrical enlargement in the head.

As regards the cooling, where the conductivity of the walls of thepiston is not sufficient to secure it, this may be effected by providinga conduit for cooling liquid,

conducting the same in the interior of the piston adjacent to the closedbottom of the piston. This conduit consists preferably of a flexiblepipe, which need only be slightly elastic. A flexible outlet pipe /i isconnected to the cover or top o0 to provide for a circulation of thecooling medium or liquid in the piston.

It is to be understood that the invention is not limited in any Way tothe method of carrying the same into effect, which has been moreparticularly described, but that all modifications are included, Whichfall Within a fair interpretation of the claims.

What I claim and desire to secure by Letters Patent of the United Statesof America is l. In an internal combustion engine of the classdescribed, the combination of a cylinder, an enlarged head for suchcylinder, a sleeve valve sliding in said cylinder and having the topedge thereof entering the enlarged head and a fixed guide piston .vithwhich said sleeve has sliding association and hingedly connected to thesaid head and acting as an internal cylindrical projection of thecylinder head, the piston being formed with a closed chamber.

2. In an internal combustion engine of the class described, thecombination of a cylinder, an enlarged head to such cylinder, a

sleeve valve sliding in said cylinder and having the top edge thereofentering the enlarged portion of the head, and a guide piston slidingWithin the said sleeve and connected to the said head by means of ajointed connecting rod, such guide piston having a cover so as to form aclosed chamber Within the piston, substantially as and for the purposesset forth.

3. In an internal combustion engine, of the class described, thecombination of a cylinder, an enlarged head to such cylinder, a sleevevalve sliding in said cylinder and having the top edge thereof enteringthe enlarged portion of the head, and a guide piston sliding Within thesaid sleeve and connected to the said head by means of a jointedconnecting` rod, such guide piston having a cover so as to form a closedchamber Within the piston, and flexible conduit connections for acooling medium communicating with the interior of the said piston.

In testimony whereof I have hereunto set my hand in presence of twosubscribing Witnesses.

HENRI VICTOR JULES JOUFFRET.

Witnesses CHAs. P. PREssLY, EUGNE TULLIER.

